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Messages - Steve1

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Plant Breeding / Re: Watermelon seed leaf size
« on: 2020-06-11, 09:47:04 PM »
There is often a good correlation between seed leaf size and hybrid vigour or heterosis. I'm guessing too, that won't correlate with fruit size, but will likely with vine vigor and *perhaps yield. We run a prac where we grow inbred parents (Brassicas), the F1 hybrid and the F2 selfed and it comes out pretty visibly - though the parents need to have good combining ability. Hope that helps.

Plant Breeding / Re: Peas 2020
« on: 2020-06-09, 12:12:31 AM »
Hi Galina,
P.fulvum I think depends on the accession as to whether it has the hard seed coat. The black seeded ones definately are hard seeded and need chipping (nail cutter works well). The fulvum line flower pictured has much less color than what I've seen. As to edibility, fulvum lines have more fibre than conventional shelling peas and thus have explosive dehiscence of the seeds from dried pods - I have tried the very immature pods and they were very pea like. I'm not sure I'd eat the dried black peas.
I haven't seen in the flesh A, Pur, Pu, gp and b - but the picture in Stathams thesis which I posted a link on the other forum had brighter red pods - not peachy. That is assuming the lines they were working with were the correct genotype.
Hope that helps.


Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-05-09, 08:01:17 PM »
A link with some interesting reading from the Sweet Potato industry in Australia

Still to harvest my SP's.  I need to get it done but home schooling the kids thanks to Covid19 is killing my time

Ditto, home schooling eh. After the belting of rain we had last night I need to harvest soon. Yes, the plan with the pH is to get some rock dust from a recommended local supplier. When COVID allows.

Sweet Potatoes / Re: Common flowering cultivars
« on: 2020-04-21, 06:18:31 AM »
Beaurgard is the main orange SP in Oz and most likely the one I have been growing here for the last 3 years.  It finally flowered for me this year,  but like Reed mentions above,  not many flowers and late in season.

Whwoz, what's your Beauregard leaf look like? Just want to make sure it's different to the one aI'm calling Evangeline.

Sweet Potatoes / Re: Common flowering cultivars
« on: 2020-04-21, 06:15:10 AM »
Evangeline seems to be the standout for me this year. Lots of flowers, probably day length neutral and have had a few seedpods develop but no mature seeds. It is Beauregard's successor in terms of orange fleshed SP but sweeter I believe. One flower spike on Okinawan out of three large plants. Northern Star was in bloom today, but was planted late and are relatively small plants. And the two purple ornamentals which flower all season it seems are also seem daylength neutral. The other one thats about to flower is Matt's Purple Flesh from Fon, leaf type is Okinawan but I'm not sure they are exactly the same yet.
Kumera mad huge running vines but I haven't seen a flower on it. Wanmun is huge but no joy, and the rest are a bit small due to being planted late. I will get them in earlier this year and hope for some more heat.

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-03-30, 07:58:06 PM »
While overseaing some prep work for what will be a 25 x 14 meter extension to the vegetable garden,  I eventually opened my eyes after walking past the SP several times and found,  not one but 4 flowers on the Beaurgard plants. While photographing the flowers for posterity,  I noticed a number of bees about.  Two honey bees flew past,  not stopping and several native bees stopped and checked it out.  One was very interested and spent a couple of minutes inside the flower,  crawling out covered in pollen!!  That bee then crawled into the next flower,  so I should find out if Beauregard is self-compatable or not.  Photos to follow

Whwoz thats good news on the Beauregard front. Is the ornamental still flowering?
I had a soil test done here last December, and the pH was 4.9. I haven't really attempted to ammend it with the exception of some mushroom compost.
I've also got one of the ornamentals flowering as a houseplant and am using pollen from the garden. I may take cuttings of the others that have multiple flowers on different stems to see if that might get me some seed set. Getting too cool outside now.

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-03-21, 03:23:32 PM »
Thanks Steve1, last time I grew sweet potato in that soil was the first time I had grown them, from memory 8 kg from 2 plants, so yes, hoping for a good crop. Still not seeing a lot of flowers,  hence the floaters. 

Re clover,  when you next pull one out,  check the roots, if nodules are present you have nitrogen fixing going on, if no nodules,  no nitrogen fixing occurring.  Clover by itself does not fix nitrogen, requires Rhizobium bacteria.

Good to hear about the different varieties flowering, makes me wonder if my soil to high in N.

I can only speculate that N may be part of it. All the legumes I planted last year (as part of the green manure) including the clovers were innoculaed with the right rhizobia. Some clovers are doing better than others, but good point - I'll go look for pink nodules.
The flip side of all this is that I probably wont get the SP yield you will whwoz. 

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-03-18, 06:45:36 PM »
Well done whwoz, those sweet potatoes look great, and I reckon you will get a good crop as well. Mine are ok for such a cool season in a first year bed. That clover is my main weed (which I leave if not to close to the plants) says something about the lack of soil nitrogen.
Interestingly, today there are buds on Matt's Purple Flesh which came from Fon later than the others. I thought it might be Okinawan as the leaves are similar shape but the Okinawan I have has a long flower stalk and this is short. The leaves most resemble Kumera / Japanese. Will still be a week or two at least before it flowers.

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-03-16, 04:47:49 AM »
I have just found my swee potato flower,  on the ornamental but still a flower!!

Nice whwoz! It's slowly happening.
Wandered over to the vege patch tonight and Evangeline had flowered today and suprisingly to me so had the Okinawan (only a single flower) and the two ornamentals. Slowly, there is a bit of momentum.
Pasted some pollen around and now we wait.

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-02-28, 03:29:43 AM »
Ok, so some good news. Firstly, I have buds on what was an unnamed bench scrap which I think I confirmed yesterday as Evangeline (daylength neutral). Also, I have another ornamental (also daylength neutral) purple heart shaped leafed SP in flower which was kindly given to me by Chris who has also been very generous in giving me lots of other varieties I've shared.

Also of note is that in discussions with Chris, I suggested I thought there should be more action on the flowering front and he commented that no, in general most of what he has are short day flowerers around the autumn equinox, with the exception of the ornamentals and Evangeline. I really need to get a list going and work out all the day neutral cultivars he has.

Anyway, with Fon having Northern Star budding, Evangeline and two ornamentals flowering we might have a crack. Fingers crossed for warm weather. 

Sweet Potatoes / Re: Sweet Potato flowering triggers
« on: 2020-02-27, 03:30:50 AM »
I just posted this video in another post as well.  At about 30 minutes he discussed grafting onto Brazilian Morning Glory rootstock to increase flowering.

Thanks Nathan. Fon42 on the Australian SP thread has been grafting to I.carnea this year as a test run for a full scaled effort next year. I think the Japanese papers i've been reading use I. nil. One trick is to make sure there are leaves below the graft for hormone production I believe.


Plant Breeding / Re: Projects at El Huerto, Oz.
« on: 2020-02-26, 06:14:40 PM »
Interesting Gregg. Sounds like youíll be selecting for salinity tolerance this year. Peninsula is great. More garden space than I can poke sticks at. Your storage tomatoís have bean about the earliest for me, which has been surprising. In general tomatoís have been slow this year. I have lost some stuff to wind rock (though not staking tomatoes). Evidently iím going to be selecting for big root systems this year.

Plant Breeding / Re: Projects at El Huerto, Oz.
« on: 2020-02-25, 06:11:17 PM »
Yep, well done Gregg! You have made some great progress in 6 months.
Looks like the bore water is working well.

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-02-24, 04:54:23 PM »
Great Gregg, at least it should save your back looking for the buds.
Just found an interesting paper from Japan (1977) looking at the effects of Gibberelins on flowering in SP.

For me the salient points from this paper were mostly summarised on p255

1) Field grown plants didn't flower

2) Short day photoperiod is necessary to induce flowering

3) GA's do increase flowering in SP under short day conditions.

4) Fall grown cuttings flower much easier than summer grown cuttings (even under short day photoperiod conditions) - and I think this one is likely key looking at Richards overwintered SP's and how much flowering they have in NZ.

Whilst there is genetic variability in SP's, as demonstrated by the ornamental purple leaf which is flowering now - this probably demonstrates why ours are generally dragging their feet.

Sweet Potatoes / Re: Breeding Sweet Potato in Australia
« on: 2020-02-23, 07:24:21 AM »
For me Reed, looking at it mean min 15.7'c and mean max 23'c. A couple of nights sub 10'c over the last few days and 8 days over 25'c so far for the month. Has been foggy here too at times. It was warm and sunny today though...

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